CN204009039U - A kind of current transformer error curve auxiliary testing system - Google Patents
A kind of current transformer error curve auxiliary testing system Download PDFInfo
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- CN204009039U CN204009039U CN201420385840.XU CN201420385840U CN204009039U CN 204009039 U CN204009039 U CN 204009039U CN 201420385840 U CN201420385840 U CN 201420385840U CN 204009039 U CN204009039 U CN 204009039U
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Abstract
The utility model relates to a kind of current transformer error curve auxiliary testing system, and this current transformer error curve auxiliary testing system comprises: input channel, channel switching module, change-over switch, hand push button, LED lamp, pulsed signal end; Therefore the utility model arranges input channel, channel switching module, change-over switch, hand push button, LED lamp, pulsed signal end; The whole connecting systems of the current return of all groups in interval, then by logic control, automatically complete all tests, thereby improve test efficiency.The utility model is applicable to site test, on the acquisition precision of current transformer error curve tester without any impact; People, for the operation of relocating becomes automatic logic control, is reduced to people for the possibility of maloperation, improve security; Disposablely connect whole circuits, avoided manpower to change the mode of connection, a people just can complete whole test, has saved manpower, has improved efficiency.
Description
Technical field
The utility model belongs to current transformer error technical field of measurement and test, relates in particular to a kind of current transformer error curve auxiliary testing system.
Background technology
At present, the volt-ampere characteristic of current transformer (CT) is the big event in current transformer (CT) performance test, principle is in the situation of current transformer (CT) primary side open circuit, Current Transformer Secondary side exciting current and the alive relation curve of Current Transformer Secondary side.The graph of errors of current transformer (CT) be take the volt-ampere characteristic of current transformer (CT) as according to making; it is the further verification to current transformer (CT) precision; also be an important fundamental characteristics of protective current transformer; what protective relaying device reacted is the malfunction of primary system; when primary system fault; during protective device action; current transformer primary current is conventionally much larger than the electric current in when operation, so the error of current transformer also can expand.In order to make the protective device can correct response primary system situation and correct operation requires the ratio error of current transformer to be less than set upper limit value.
Conventionally, the test of current transformer (CT) graph of errors completes at the scene, Current Transformer (CT) graph of errors tester connects current transformer (CT) secondary side terminal image data, then after calculating by current transformer (CT) graph of errors tester, automatically draw out graph of errors, judge whether coincidence loss standard of field erected current transformer (CT).Each phase that gathers one group of CT.Current transformer (CT) first side winding is serially connected with electrical network, secondary side winding is drawn and is then connected on secondary side terminal row by S terminal, each phase current mutual inductor (CT) generally has Secondary Winding coil more than two, on terminal row, form respectively many groups three-phase current loop (A, B, C, N), the secondary side terminal row in each interval has four groups of current returns conventionally.Make at the scene in the process of Current Transformer (CT) graph of errors tester test, can only test the phase (A, N) in one group of electric current at every turn, this need of work two people coordinated, people's operating current mutual inductor (CT) graph of errors tester, another people stands in the commutation of relocating in interval, often test once changing mutually next phase, the efficiency of test is lower like this.
Utility model content
The utility model is for solving the manual operation that needs that the test of current transformer error curve exists, ineffective problem and a kind of simple in structure, easy to install, current transformer error curve auxiliary testing system of increasing work efficiency is provided.
The technical scheme that the utility model is taked for the technical matters existing in solution known technology is:
The current transformer error curve auxiliary testing system of the utility model embodiment, this current transformer error curve auxiliary testing system comprises: input channel, channel switching module, change-over switch, hand push button, LED lamp, pulsed signal end;
For connecting the input channel of secondary winding in current transformer output, be connected the channel switching module of switching for control channel with input channel, be connected with channel switching module for selecting the change-over switch of manual/auto operation, be connected the hand push button switching for manual control channel with channel switching module with change-over switch, be connected the LED lamp for display channel state with channel switching module, be connected the pulsed signal end for received current transformer error curve tester pulse signal with change-over switch with channel switching module.
The utility model can also adopt following technical measures:
In embodiment of the present utility model, input channel comprises 12 passages, and 3 passages are 1 group, the A utmost point, the B utmost point and the C utmost point of four groups of current returns in every group of difference corresponding current mutual inductor secondary side terminal row.
Further, LED lamp comprises 12 state LED, corresponding with 12 passages of input channel respectively.
Advantage and the good effect that the utlity model has are: because the utility model arranges input channel, channel switching module, change-over switch, hand push button, LED lamp, pulsed signal end; The whole connecting systems of the current return of all groups in interval, then by logic control, automatically complete all tests.The utility model is applicable to site test, on the acquisition precision of current transformer error curve tester without any impact; People is become to automatic logic control for the operation change of relocating, reduce the possibility that people is maloperation, also reduced frequent contact the between testing crew and charging equipment, promoted to a certain extent job security; The disposable test connection that connects all tested group CT in dish cabinet taked one group of CT of every test separately just to change the mode of single test wiring in the past, had saved the time of repetitive operation under comparing, and had improved greatly work efficiency; (people's mode of operation that before changing, two people coordinate relocates in dish cabinet, a people controls tester), use this cover current transformer error curve auxiliary testing system to test, singlely just can complete whole test and (connect after all test wires, start auxiliary testing system, all tests will complete automatically according to logic), saved the required manpower of this experiment work.
Accompanying drawing explanation
Fig. 1 is the current transformer error curve auxiliary testing system structural representation that the utility model embodiment provides;
Fig. 2 is the inner structure schematic diagram of the current transformer error curve auxiliary testing system that provides of the utility model embodiment;
In figure: 1, input channel; 2, channel switching module; 3, change-over switch; 4, hand push button; 5, LED lamp; 6, pulsed signal end.
Embodiment
For further understanding summary of the invention of the present utility model, Characteristic, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows: the utility model software module used or unit all belong to known module or unit, when buying hardware module or unit, this software has been installed.There is not the innovation of software or method in the utility model.
Refer to Fig. 1 and Fig. 2:
As shown in Figure 1, the current transformer error curve auxiliary testing system of the utility model embodiment mainly by: input channel 1, channel switching module 2, change-over switch 3, hand push button 4, LED lamp 5, pulsed signal end 6 form;
For connecting the input channel 1 of secondary winding in current transformer output, be connected the channel switching module 2 of switching for control channel with input channel 1, be connected with channel switching module 2 for selecting the change-over switch 3 of manual/auto operation, be connected the hand push button 4 switching for manual control channel with channel switching module 2 with change-over switch 3, be connected the LED5 for display channel state with channel switching module 2, be connected the pulsed signal end 6 for received current transformer error curve tester pulse signal with change-over switch 3 with channel switching module 2;
In embodiment of the present utility model, input channel comprises 12 passages, and 3 passages are 1 group, the A utmost point, the B utmost point and the C utmost point of four groups of current returns in every group of corresponding CT secondary side terminal row of difference.
Channel switching module is connected with the change-over switch of manual/auto operation, and when described change-over switch is under automatic mode, channel switching module can automatically switch to next passage after CT graph of errors tester often completes a phase lane testing; When described change-over switch is under manual mode, channel switching module is under described hand push button effect, and often, by a hand push button, passage switches to next passage.
LED lamp comprises 12 state LED, corresponding with 12 passages of input channel respectively, passage gating, and corresponding LED lamp lights.
Embodiment of the present utility model:
In Fig. 1, CT secondary side terminal row has four groups of current returns, accesses the N utmost point of CT graph of errors tester after the N utmost point short circuit of each group gets up; In 1 to 12 passage in the A of each group, B, C difference connecting system, then draw an A utmost point access CT graph of errors tester A utmost point by system; In system, change-over switch is pushed to manual position, often touch the button, passage is switched to the next one, and corresponding channel LED lantern festival lights simultaneously; Change-over switch is pushed to automated location, by the automatic control channel of pulse signal, switched, pulse signal is sent by a pair of node of l, n of CT graph of errors tester, CT graph of errors tester is set and often completes after a phase lane testing, sends out a pulse signal.
Concrete operations flow process is, connect all outer lines, change-over switch pushes automated location, 1 conducting of system initial default passage, control CT graph of errors tester and start test, after off-test, CT graph of errors tester sends pulse signal automatically, be switched to passage 2, and then this tests by passage 1 in l, n node control system; If need revision test, change-over switch is pushed to manual position, with button manual switchover passage, extremely need the passage of test.
In Fig. 2, change-over switch is pushed to automatic or manual position, corresponding function can realize; Channel switching module adopts MT8808 model, and this model module is active from charged pool, carries LED passage pilot lamp, by hand push button or autompulse signal, all can realize switching; The A utmost point output of the extremely corresponding CT graph of errors of A tester, A, B, the input of the C utmost point of four groups of current returns in 12 corresponding CT secondary side terminal rows of switching channel difference.
The utility model becomes manual operation into automatic logical operation, reduces human error, more safe and reliable.The work that originally needed two people to carry out is reduced to people's operation, and field wiring is simple, and operating process is simplified, and has greatly improved test efficiency.
The utility model is applicable to site test, on the acquisition precision of current transformer error curve tester without any impact; People is become to automatic logic control for the operation change of relocating, reduce the possibility that people is maloperation, also reduced frequent contact the between testing crew and charging equipment, promoted to a certain extent job security; The disposable test connection that connects all tested group CT in dish cabinet taked one group of CT of every test separately just to change the mode of single test wiring in the past, had saved the time of repetitive operation under comparing, and had improved greatly work efficiency; (people's mode of operation that before changing, two people coordinate relocates in dish cabinet, a people controls tester), use this cover current transformer error curve auxiliary testing system to test, singlely just can complete whole test and (connect after all test wires, start auxiliary testing system, all tests will complete automatically according to logic), saved the required manpower of this experiment work.
The above is only to preferred embodiment of the present utility model, not the utility model is done to any pro forma restriction, every foundation technical spirit of the present utility model is to any simple modification made for any of the above embodiments, equivalent variations and modification, all belong in the scope of technical solutions of the utility model.
Claims (3)
1. a current transformer error curve auxiliary testing system, is characterized in that, this current transformer error curve auxiliary testing system comprises: input channel, channel switching module, change-over switch, hand push button, LED lamp, pulsed signal end;
For connecting the input channel of secondary winding in current transformer output, be connected the channel switching module of switching for control channel with input channel, be connected with channel switching module for selecting the change-over switch of manual/auto operation, be connected the hand push button switching for manual control channel with channel switching module with change-over switch, be connected the LED lamp for display channel state with channel switching module, be connected the pulsed signal end for received current transformer error curve tester pulse signal with change-over switch with channel switching module.
2. current transformer error curve auxiliary testing system as claimed in claim 1, it is characterized in that, input channel comprises 12 passages, and 3 passages are 1 group, the A utmost point, the B utmost point and the C utmost point of four groups of current returns in every group of difference corresponding current mutual inductor secondary side terminal row.
3. current transformer error curve auxiliary testing system as claimed in claim 1, is characterized in that, LED lamp comprises 12 state LED, corresponding with 12 passages of input channel respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420385840.XU CN204009039U (en) | 2014-07-14 | 2014-07-14 | A kind of current transformer error curve auxiliary testing system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420385840.XU CN204009039U (en) | 2014-07-14 | 2014-07-14 | A kind of current transformer error curve auxiliary testing system |
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| CN204009039U true CN204009039U (en) | 2014-12-10 |
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| CN201420385840.XU Expired - Lifetime CN204009039U (en) | 2014-07-14 | 2014-07-14 | A kind of current transformer error curve auxiliary testing system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105022016A (en) * | 2015-06-23 | 2015-11-04 | 国网辽宁省电力有限公司检修分公司 | Quick zero-flux current transformer test wiring device and use method |
| CN106990379A (en) * | 2017-05-23 | 2017-07-28 | 国网天津市电力公司 | Current transformer error check test system |
| CN112327016A (en) * | 2020-11-05 | 2021-02-05 | 国网湖北省电力有限公司宜昌供电公司 | Current transformer test wire box |
| CN112924920A (en) * | 2021-02-02 | 2021-06-08 | 中国南方电网有限责任公司超高压输电公司柳州局 | Portable measuring device and parameter measuring method for high-voltage electromagnetic voltage transformer |
| CN115494442A (en) * | 2022-10-14 | 2022-12-20 | 国网四川省电力公司电力科学研究院 | Energy equivalence-based multi-current transformer transformation ratio error detection method and system |
-
2014
- 2014-07-14 CN CN201420385840.XU patent/CN204009039U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105022016A (en) * | 2015-06-23 | 2015-11-04 | 国网辽宁省电力有限公司检修分公司 | Quick zero-flux current transformer test wiring device and use method |
| CN106990379A (en) * | 2017-05-23 | 2017-07-28 | 国网天津市电力公司 | Current transformer error check test system |
| CN112327016A (en) * | 2020-11-05 | 2021-02-05 | 国网湖北省电力有限公司宜昌供电公司 | Current transformer test wire box |
| CN112924920A (en) * | 2021-02-02 | 2021-06-08 | 中国南方电网有限责任公司超高压输电公司柳州局 | Portable measuring device and parameter measuring method for high-voltage electromagnetic voltage transformer |
| CN115494442A (en) * | 2022-10-14 | 2022-12-20 | 国网四川省电力公司电力科学研究院 | Energy equivalence-based multi-current transformer transformation ratio error detection method and system |
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| C14 | Grant of patent or utility model | ||
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Address after: 300010 Tianjin city Hebei District Wujing Road No. 39 Patentee after: State Grid Corporation of China Patentee after: STATE GRID TIANJIN ELECTRIC POWER Co. Address before: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee before: State Grid Corporation of China Patentee before: STATE GRID TIANJIN ELECTRIC POWER Co. |
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Granted publication date: 20141210 |